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Pseudonym of Doris Bell Collier Ball. She was born in Manchester. She studied medicine. She also wrote historical novels. |
Titles and year of publication:
| 1) Death on the Borough Council | 1937 |
| 2) Murder in Hospital | 1937 |
| 3) Fall Over Cliff | 1938 |
| 4) The Port of London Murders | 1938 |
| 5) Death at Half-Term (US Title: Curtain Call for a Corpse) | 1939 |
| 6) From Natural Causes | 1939 |
| 7) All Is Vanity | 1940 |
| 8) Trouble at Wrekin Farm | 1942 |
| 9) Death at the Medical Board | 1944 |
| 10) Death in Clairvoyance | 1949 |
| 11) The Summer School Mystery | 1950 |
| 12) The Backing Winds | 1951 |
| 13) To Let, Furnished (US Title: Stranger on a Cliff) | 1952 |
| 14) Bones in the Barrow | 1953 |
| 15) Fires at Fairlawn | 1954 |
| 16) The China Roundabout (US Title: Murder on the Merry-Go-Round) | 1956 |
| 17) Death in Retirement | 1956 |
| 18) Double Doom | 1957 |
| 19) The Seeing Eye | 1958 |
| 20) Easy Prey | 1959 |
| 21) The House Above the River | 1959 |
| 22) A Well-Known Face | 1960 |
| 23) New People at the Hollies | 1961 |
| 24) Adventure with Crime | 1962 |
| 25) A Flat Tyre in Fulham (US Title: Fiasco in Fulham) (Also published as: Room for a Body) | 1963 |
| 26) The Hunter and the Trapped | 1963 |
| 27) The Alien | 1964 |
| 28) The Upfold Witch | 1964 |
| 29) No Escape | 1965 |
| 30) The Catalyst | 1966 |
| 31) Death on the Reserve | 1966 |
| 32) Death of a Con Man | 1968 |
| 33) The Fennister Affair | 1969 |
| 34) The Wilberforce Legacy | 1969 |
| 35) A Hydra with Six Heads | 1970 |
| 36) A Hole in the Ground | 1971 |
| 37) Death of a Poison-Tongue | 1972 |
| 38) A Pigeon Among the Cats | 1974 |
| 39) Victim | 1975 |
| 40) The Trouble in Hunter Ward | 1976 |
| 41) Such a Nice Client (US Title: A Stroke of Death) | 1977 |
| 42) A Swan-Song Betrayed (US Title: Treachery in Type) | 1978 |
| 43) Wolf! Wolf! | 1979 |
| 44) A Question of Inheritance | 1980 |
| 45) The Innocent (US Title: A Deadly Place to Stay) | 1983 |